Train telephonic apparatus



Feb- 1 0, 1931-` 1 l. BERLINERETAL 15191387 TRAIN TELEPHONIC APPARATUSFiled nec. `1a. 1929 20 the following specification and illustratedresented Feb. io, 1931 UNITED STAT 11s PATENT OFFICE i :sinon BERLINERAND SAMUEL BERLINER; or Nnw YORK, N. Y.

TRAIN TELEPHONIC Arrnlzuanzii'Ts Application med December 1s, 1929.serial No. 414,867.'

Our invention relates to improvements in train telephonie apparatus andthe object of the invention is to provide a simple apparatus adaptablefor 'use on railroads wherein telephonic communication can beestablished between stations, between station and train, between trainand train, no matter whether the trains are on the same track or ondifferent tracks and irrespective of the direction in 1o which they areproceeding, and between a .central exchange and a train, whether movingor stationary.

A further object 1s to provide, in addition,

telephonic inter-communication in a train between the respective coachesand the cab of the engine. I j Ourv invention consists essentially inthe following arrangement and construction as hereinafter moreparticularly explained by 1n the .drawing in which Fig. 1 represents adiagrammatic view of our system showing the same applied to a doubletrack railroad line, two stations being indicated. 'j "fw i' Fig. 2 is avertical crosssectional view of a railroad truck 'showing an axleconstructed according to our invention, mounted in bearings which areinsulated from the journal boxes, and also the connections tothe traincircuit.

Fig. 3 is a vertical section through the line 3-3 Figure 2. n Fig. 4 isa sectional view through 'the coupling between the divided portions ofthe axle showing the means for insulating these two portions from eachother, and

Fig. ois a section similar to Figure 2, illustrating a modified meansfor connecting the train telephone circuit to the wheel axle.

Like characters of reference indicate corresponding parts in thedifferent views.

1, 1 and 2, 2 are the rails of the respective tracks, the sections ofthe rail 1, 1 and 2, 2 being insulated from adjacent sections. 3, 3 and4, 4 are line wires para'leling the tracks and which may bestrungv alongpoles, or otherwise mounted, being connected to the respective stationtelephones 5, 5 by the wires 6, 6. Line wires 7 7 may also extendbetween the respective station'telephones 5, 5 and in addition wires 8,8may be connected in circuit, such wires 8, 8 extending to centraltelephone exchanges. The line wires 3, 3 are also provided with bridgingwires 9 and 10 connecting such wires tothe respective rails 1, 1 of eachtrack, and further bridging' .wires`11 and 12 connect the line-wires 4,4.

to the respective rails 2, 2 of the other track. I n Figure 1 in dottedlines are shown three trains, two onone track and one on Y the other,the coaches being indicated -by 13 and A the cabs of the engines by 14.15 are the train telephones which are preferably located one in eachcoach and one in the cab 14 of the locomotive. 16 are the wires of thetrain telephonic circuit provided with connectors 17 between the engine'and following coach, and between successive coaches, said telephones V15being in circuit with the wires 16 and suchwires being connected to thedivided portions 18 of Aa single car axle ina manner which willhereinafter appear. .Y

illustrated-inFigures 2, 4 and 5 of the drawing/the divided axleportions 18 are se cured together by means of the coupling portions 19,which are insulated from each other through the medium of the insulatingVdisc 20, said axle portions 1'8Vcarrying the wheels 21 constructed andmounted Aon the axle portions vin the orthodox manner. The outer ends ofthe axle portions 18 are re? ceived in the bearing rings 2() which areinsulated from the vjournal-.boxes 23 through the medium of theinsulating rings 24..

ln the construction illustrated in Figures '2 and 3 the means ofconnecting the terminal ends of the train telephonie circuit wires 16 tothe axle portions 18 is through rods 25 which are insulated from thetruck frame 26, 'said rods being connected to the gear 'frames 27, eachof which carries ,a gear 28 meshing with a gear 29 on the correspondingaxle portion 18.

In" the modiied construction illustrated. in Figure '5 instead of theconnection between the terminals of the wires 16 fand the aXle portions18 being constructed as illustrated Vin Figures '2 and 3, lead wires 30,each connected at one end toa wire 16 and at the other to the metallicaxle 'bearing 22, are provided.

Bridging wires 31 extend between the line vwires 3, 3 and 4, 4 so thatthe circuit may bev completed through the rails 2, 2 and the traincircuits of thetrains on such track.

For sake of clarity the various instruments' and batteries in thetelephone circuits have not been shown as these will bestandard, wellknown to. any one skilled in the particular art to. which this inventionappertains.

If reference is made to our previous United States Patent #1,350,291,the respective circuits are shown in detail and need not be repeatedhere.

Upon referring to Figure l-it will be seen that communication-can beestablished between any station 5 and the telephones l5 of any train.lLikewise, communicationcan be established between a subscriber to acentral exchange connected to the wires 8, 8. and any telephone in atrain. In addition, intercommunication lcan be had between the cab'ofthe engine and any coach in the train, or vice versa. Ve preferablyrprovide our split axle on the end coach of a train, it being understoodthat only one axle for each train need be constructed in this specialmanner, the remaining axles being of standard construction.

The uses to which our apparatus may be put` are very numerous, `the mostimportant among them is that train despatching can be doneby telephonedirect to the engine of the train concerned or to any selected telephonethereon.

The system will operate no matter whether y with the addition of a gearon each axle section, a frame mounted thereon, a second gear on thetrame in mesh with the lirst gear, and a wire connected tosaid frame.

ISIDOR BERLINER. SAMUEL BERLINER.

the trains'arestationary or moving and quite irrespective of the speedof the train.

As above described the circuit" is com-*M pleted through two wheels andaxle portions` no necessity of any further contact between 'rails andtrain.

Furthermore, the fact that intercommunication is established'between therespective coaches and the engine is of great advan-f 'i tage,enabling'conductorsand train men to get in touch with the v-englnedriver or lireman, or 'vice versa.

It is to be -understood that this apparatus will, preferably operate onthe Bell telephone system, and switchboards for connecting any desiredphone to any other' desired ghone will beinclu'ded in the installation.

uch switchboardsfhave not been shown as they form no part of the presentinvention.

What we claim as our invention is:

1. In a train dispatching telephone system, the combination with aplural rail track and -a train movable thereon, said train having awheeled truckprovided with an axle consisting of sections disposed inendwise relation to each other, coupling means insulating said sectionsfrom each other, wheels on` 'said axle, a. telephone onl said car,airin-

